TOPIC: BOQ of IP Dslams required

I need to prepare a BOQ of Ip dslam , now i need to select an IP dslam with 100 ports , can anyone suggest me the best cost effective solution ?feel free to suggest any vendor of Ip Dslams and ADSL modems.

What ipdslam solution have you acquired?
Btw, can you give me an idea on how to plan the backhaul of the ipdslam in terms of bandwidth. For example, a subscriber can have an available bandwidth of x during high backhaul utilization and also y during low backhaul utilization.